PROCESS AND APPARATUS FOR THE CATALYTIC OXIDATION OF SO2-CONTAINING GASES BY MEANS OF OXYGEN

摘要

The present invention relates to a process for the continuous catalytic c omplete or partial oxidation of a starting gas containing from 0.1 to 66% by volume of sulphur dioxide plus oxygen, in which the catalyst is kept active by means of pseudoisothermal process conditions with introduction or remova l of energy. In addition, the present invention relates to an apparatus for the continuous catalytic complete or partial oxidation of a starting gas con taining sulphur dioxide and oxygen, characterized by at least one tube conta ct apparatus which is an upright heat exchanger composed of at least one dou ble-walled tube whose catalyst-filled inner tube forms a reaction tube, with heat being transferred in cocurrent around the reaction tube and an absorbe r for separating off SO3 being installed downstream of the tube contact appa ratus. The reactivity of the catalyst is preset by mixing with inert materia l. The apparatus of the invention is particularly suitable for carrying out the process of the invention.